There are two most common ways of fuel adulteration. The most common is what is known as a “low pump”, when it sends less fuel to the car than what is being paid for. It's as if, for every liter paid, only 900 ml reached the car's tank. Another form of adulteration is in the fuel itself, mixing water (in the case of ethanol) or solvents or more alcohol (in the case of gasoline). That is, you pay for the liter of quality fuel, but the supply is made with a “diluted” fuel.
According to Quatro Rodas magazine, the Prime S pump, from the manufacturer Gilbarco Veeder-Root, promises to eliminate these two types of tampering and even allows information about the quality of the fuel to be on the invoice.
This pump was launched at the end of 2020 and is compatible with the digital certification of pumps, a system that has been implemented by Inmetro. It consists of using a pulser (an electronic meter) at the gas station pump to verify that the amount of energy generated by the equipment is compatible with the volume of fuel placed in the vehicle's tank. A CPU digitally signs the measurement data.
Prime S still uses asymmetric encryption in the transmission of data between the pulser and the CPU, which, according to the manufacturer, is where data deviations or manipulations are made (and this can be remotely disabled).
As of this year, the same pump can still be integrated into a fuel density monitoring probe, the Mag D probe. All fuel has a standard density determined by the agencies.
The probe ensures that the product meets the specifications, also depending on the temperature of the fuel, and sends the information to the point of sale at the gas station. The fuel density is recorded on the invoice. But this is still at the discretion of the post, it is not mandatory.
New bombs are mandatory
The exchange of fuel pumps for new ones, with digital certification, takes place in three ways: either in case of proven fraud, or if it is necessary to replace the pump depending on its date of manufacture. Ordinance No. 516/2019 extended the deadlines for the replacement of pumps depending on their date of manufacture. Changing all of them can take almost 10 years.